How on earth did we get here? How did we arrive in a world where temperatures in British Columbia can come within a whisker of 50C, where a ring of fire made Athens look apocalyptic, massive floods ripped apart towns in Belgium and Germany – yet still there is no international plan for how to keep the world habitable by the end of the century, and those protesting about that are labelled extremists?

Hot Air, by the leading climate scientist Peter Stott, offers an explanation.